Monday, 11 August 2014

What Does IPv4 Properties Signify?

While configuring a system (PC, laptop or handheld devices) to any network, mostly Internet, we come across few fields to be filled up for establishing a connection. These fields are labelled under "IPv4 Properties". 
These properties can be modified in two possible ways-
1. DHCP aka Dynamic Host Configuration Protocol
2. Manually entering IP settings

If the network supports DHCP, then there is no need of configuring the system to connect to a network. However, if the system is to be connected in a particular subnetwork (a smaller division in a network) then usually user need to enter IP addresses manually. In such cases, we come across following window asking for the fields to be filled up.


We need to consider four fields here.
1. IP address-It is the IP address (logical address) of the device to be connected. 
2. Subnet mask-It is basically used to identify the subnetwork. Subnet mask is a unique combination of Subnet id and host (system) id.
3. Default gateway-All subnets are connected to parent network via a high-end device called Router. Default gateway is the IP address of router in the network. 
4. DNS (Domain Name System)-It is a naming mechanism to provide names to systems in the Internet. In our discussion, DNS refers to the IP address of the router at ISP (Internet Service Provider). ISP is the "big brother" from whom the user has subscribed for the Internet.

The correct combination of all these fields will make a successful connection to the desired network. 

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